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Reconstruction of complete interval tournaments. II
score sequences tournaments efficiency of algorithms
2011/2/23
Let a, b (b ≥ a) and n (n ≥ 2) be nonnegative integers and let T (a, b, n) be the set of such generalised tournaments, in which every pair of distinct players is connected at most with b, and at least...
Good tilting modules and recollements of derived module categories
Commutative algebras Coproducts Derived categories p-adic numbers Recollements Ring epimorphisms Tilting
2011/1/20
Let T be an infinitely generated tilting module of projective dimension at most one over an arbitrary associative ring A, and let B be the endomorphism ring of T.
Inductions and restrictions for stable equivalences of Morita type
Admissible sets derived equivalences self-injective algebras stable equivalences
2011/1/20
In this paper, we present two methods, induction and restriction procedures, to construct new stable equivalences of Morita type.
A profile decomposition approach to the $L^\infty_t(L^3_x)$ Navier-Stokes regularity criterion
$L^\infty_t(L^3_x)$ Navier-Stokes regularity criterion
2011/1/17
In this paper we continue to develop an alternative viewpoint on recent studies of Navier-Stokes regularity in critical spaces, a program which was started in the recent work [13] by C.
Kenig and the...
Model theoretic internality provides conditions under which the group of automorphisms of a model over a reduct is itself a definable group. In this paper we formulate a categorical analogue of the co...
We extend the descent theory of Colliot-Th´el`ene and Sansuc to arbi-trary smooth algebraic varieties by removing the condition that every invertible regular function is constant. This links the...
The Feynman checkerboard problem is an interesting path integral approach to the Dirac equation in ‘1+1’ dimensions. I compare two approaches reported in the literature and show how they may be reconc...
Comparison results for capacity
capacity equilibrium potential hiperbolicity mean curvature
2011/1/17
We obtain in this paper bounds for the capacity of a compact set K with smooth boundary. If K is contained in an (n + 1)-dimensional Cartan-Hadamard manifold and the principal curvatures of @K are lar...
2010年11月6日，华罗庚先生诞辰100周年纪念大会在京召开。来自全国各地的300多名出席中国管理科学第12届学术年会的代表和嘉宾共同深切缅怀了华罗庚的卓越成就及其献身祖国科学事业的崇高精神。民盟中央副主席李重庵、中国科学院党组副书记方新等出席会议并致辞。本次纪念大会是由华罗庚教授创办的中国优选法统筹法与经济数学研究会与中国科学院科技政策与管理科学研究所共同主办。方新在致辞中指出，华罗庚先生是杰...
Is the five-flow conjecture almost false?
Nowhere–zero flows flow polynomial flow roots Tutte’s five–flow conjecture
2010/12/9
The number of nowhere-zero ZQ flows on a graph G can be shown to be a polynomial in Q,efining the flow polynomial G(Q). According to Tutte’s five-flow conjecture,G(5) > 0 for any bridgeless G.
山东大学数学学院胡发胜教授
山东大学数学学院 教授 运筹学
2010/9/20
胡发胜，男，1965年10月生，1982年9月考入山东大学数学系数学专业学习，1986年7月获力学学士学位，同年9月考入山东大学数学系运筹学专业研究生，师从文川教授。1988年留校任教，1991获硕士学位，1992年任讲师，1994年9月考入山东大学数学系运筹学专业研究生，攻读运筹学在经济中的应用方向博士学位，期间获山东大学奖学金。1997年任副教授。几年来，主要致力于多部门经济不失平衡条件的研究...
In the literature there are two different notions of lovely pairs of a theory T, according to whether T is simple or geometric. We introduce a notion of lovely pairs for an independence relation, whic...
Escape from the potential well: competition between long jumps and long waiting times
potential well competition between long jumps long waiting times
2010/12/15
Within a concept of the fractional diffusion equation and subordination, the paper examines the
influence of a competition between long waiting times and long jumps on the escape from the poten-tial ...
Transportation cost inequalities for diffusions under uniform distance
Entropy (multi-valued) stochastic differential equations dissipative functions
2010/12/13
We prove the transportation inequality with the uniform norm for the laws of diffusion pro-
cesses with Lipschitz and/or dissipative coefficients and apply them to some singular stochastic differenti...
Factorization systems induced by weak distributive laws
Factorization systems weak distributive laws
2010/11/29
We relate weak distributive laws in SetMat to strictly associative (but not strictly unital) pseudoalgebras of the 2-monad (−)2 on Cat. The corresponding orthogonal factorization systems are cha...